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AMD A6-1450 APU "Temash" Review
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Sony Xperia Tablet Z Review

AMD Radeon HD 7640G + HD 7670M Dual Graphics

The AMD Radeon HD 7640G + HD 7670M Dual Graphics is the combination of a integrated AMD Radeon HD 7640G APU processor graphics card and a dedicated entry level AMD Radeon HD 7670M graphics card in CrossFire combination. It is called AMD Dual Graphics or asymmetric CrossFire and uses AFR (Alternate Frame Rendering) to render different frames on the two graphic cores. Therefore the combination also suffers from micro stuttering (different spaces between two images lead to stuttering altough the framerate is high enough for fluent gaming with only one GPU).

The performance of the Dual Graphics solution depends greatly on the driver support for the used games. In some games the performance may even degrade by 10-15% compared to using only the APU graphics card. Therefore, due to the micro stuttering and performance problems, Dual Graphics may impose more problems than bring performance gains. Only in a best case scenario the performance is similar to the GeForce GT 635M.

The features like PureVideo HD (UVD3) or OpenCL support are similar to the two graphics cards.

As both graphics cards are rendering frames, the power consumption is clearly higher than using only one GPU.

ManufacturerAMD
Radeon HD 7600M Series

Radeon HD 7690M XT 480@725MHz

Radeon HD 7690M 480@600 - 725MHz

Radeon HD 7660G + HD 7670M Dual Graphics 862@685 / 600MHz

Radeon HD 7640G + HD 7670M Dual Graphics 736@655 / 600MHz

Radeon HD 7520G + HD 7670M Dual Graphics 736@655 / 600MHz

Radeon HD 7670M 480@600MHz

Radeon HD 7650M 480@450-550MHz

Radeon HD 7630M 480@450MHz

Radeon HD 7640G + HD 7610M Dual Graphics 656@655 / 450MHz

Radeon HD 7610M 400@450MHz

ArchitectureTerascale 3
Pipelines736 - unified
Core Speed *655 / 600 MHz
Shader Speed *655 / 600 MHz
Memory Speed *900 MHz
Memory Bus Width128 Bit
Shared Memoryyes
DirectXDirectX 11, Shader 5.0
technology32/40 nm
Notebook Sizemedium sized
Date of Announcement15.05.2012
* The specified clock rates are only guidelines for the manufacturer and can be altered by them.

Benchmarks

3DMark 11 - Performance 1280x720
0% 100%
min: 1585     avg: 1626.3 (16%)     max: 1664 points
3DMark 11 - Performance GPU 1280x720
0% 100%
min: 1629     avg: 1671 (15%)     max: 1757 points
3DMark Vantage - P Result no PhysX 1280x1024
0% 100%
min: 4696     avg: 4969.8 (14%)     max: 5085 Points
3DMark Vantage - P GPU no PhysX 1280x1024
0% 100%
min: 4554     avg: 4811.5 (13%)     max: 4918 Points
3DMark 06
0% 100%
min: 7090     avg: 8121.5 (28%)     max: 8493 Points
3DMark 05 - Standard 1024x768
0% 100%
min: 10288     avg: 10402.7 (28%)     max: 10632 Points
3DMark 03 - Standard 1024x768
0% 100%
min: 21584     avg: 21584 (14%)     max: 21584 Points
PCMark Vantage - Gaming Score 1024x768
0% 100%
min: 3528     avg: 3528 (13%)     max: 3528 Points
Cinebench R11.5 - OpenGL 64Bit
0% 100%
min: 17.26     avg: 24.4 (28%)     max: 31.57 Points
Cinebench R10 - Shading 32Bit
0% 100%
min: 4566     avg: 4589 (42%)     max: 4612 Points
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card

Game Benchmarks

The following benchmarks stem from our benchmarks of review laptops. The performance depends on the used graphics memory, clock rate, processor, system settings, drivers, and operating systems. So the results don't have to be representative for all laptops with this GPU. For detailled information on the benchmark results, click on the fps number.

Crysis 3
Crysis 3 (2013)
low:
28.7  fps      Compare
med.:
15  fps      Compare
high:
10.5  fps      Compare
» The benchmarks indicate that the game is not playable in the tested settings.
Dead Space 3
Dead Space 3 (2013)
low:
99.2  fps      Compare
med.:
45.9  fps      Compare
high:
35.9  fps      Compare
» With all tested laptops playable in detail settings high.
Far Cry 3 (2012): Playable with a weaker graphics card in detail settings low. - more...
Hitman: Absolution
low:
19.9  fps      Compare
med.:
18.7  fps      Compare
high:
13.4  fps      Compare
» The benchmarks indicate that the game is not playable in the tested settings.
Call of Duty: Black Ops 2 (2012): Playable with a weaker graphics card in detail settings med.. - more...
Fifa 13
Fifa 13 (2012)
low:
130.8 133 ~ 132 fps      Compare
med.:
100.9 108 ~ 104 fps      Compare
high:
99.4 103 ~ 101 fps      Compare
ultra:
65 71 ~ 68 fps      Compare
» With all tested laptops playable in detail settings ultra.
F1 2012 (2012): Not playable with a weaker graphics card. - more...
Dirt Showdown
low:
34.2 37.4 ~ 36 fps      Compare
med.:
26.7  fps      Compare
high:
25.5  fps      Compare
» With most tested laptops playable in detail settings low.
Diablo III
Diablo III (2012)
low:
78.5 96 98 ~ 91 fps      Compare
med.:
74 74 ~ 74 fps      Compare
high:
65.4 70 ~ 68 fps      Compare
ultra:
43.3 48 ~ 46 fps      Compare
» With all tested laptops playable in detail settings ultra.
Risen 2: Dark Waters (2012): Not playable with a weaker graphics card. - more...
Anno 2070
Anno 2070 (2011)
low:
69 74.9 90 ~ 78 fps      Compare
med.:
28 31.8 ~ 30 fps      Compare
high:
19 20.6 ~ 20 fps      Compare
» With all tested laptops playable in detail settings low.
The Elder Scrolls V: Skyrim
low:
35.1  fps      Compare
med.:
30.8  fps      Compare
high:
25.1  fps      Compare
» With all tested laptops playable in detail settings low.
CoD: Modern Warfare 3 (2011): Playable with a weaker graphics card in detail settings high. - more...
F1 2011
F1 2011 (2011)
low:
59  fps      Compare
med.:
37  fps      Compare
» With all tested laptops playable in detail settings med..
Deus Ex Human Revolution
low:
95.5  fps      Compare
» With all tested laptops playable in detail settings low.
Dirt 3
Dirt 3 (2011)
low:
70.3  fps      Compare
med.:
41.3  fps      Compare
» With all tested laptops playable in detail settings med..
The Witcher 2: Assassins of Kings (2011): Not playable with a weaker graphics card. - more...

For more games that might be playable and a list of all games and graphics cards visit our Gaming List

Notebook reviews with AMD Radeon HD 7640G + HD 7670M Dual Graphics graphics card

Asus K75DE-TY068H: AMD A-Series A8-4500M, 17.3", 3.1 kg
  Review » Review Asus K75DE Notebook

Samsung Serie 3 355E7C-S05DE: AMD A-Series A8-4500M, 17.3", 2.8 kg
  Review » Review Samsung Series 3 355E7C-S05DE Notebook

» Comparison of GPUs
Detailled list of all laptop GPUs with a short description. Classified and sorted by performance.

» Benchmark List
Sortable and restrainable list of all GPUs with benchmarks (e.g. 3DMarks).

» Notebook Gaming List
Which game can be played with my graphics card.

Class 1
GeForce GTX 590
Radeon HD 7970
GeForce GTX 660 Ti
Radeon HD 7870
GeForce GTX 580
Radeon HD 6970
GeForce GTX 570
GeForce GTX 480
GeForce GTX 560 Ti
Radeon HD 6870
Radeon HD 5850
Radeon HD 7770
Radeon HD 7770
GeForce GTX 460 768MB
Radeon HD 6790
Radeon HD 5770
GeForce GTX 550 Ti
Class 2
GeForce GTS 450
Radeon HD 4850
Class 3
Radeon HD 5670
GeForce GT 240
GeForce GT 430
Radeon HD 5570
GeForce GT 220
Radeon HD 6450 GDDR5
Class 4
Class 5
Radeon HD 4350
GeForce G 107M *
Chrome9HD *
PowerVR SGX554MP4 *
Mali-T604 *
Class 6
PowerVR SGX543MP4 *
Adreno 320 *
PowerVR SGX543MP3 *
PowerVR SGX543MP2 *
PowerVR SGX545
PowerVR SGX544 *
Adreno 305 *
Adreno 225 *
Vivante GC4000 *
Mali-400 MP4 *
VideoCore-IV *
Adreno 220 *
Vivante GC1000+ Dual-Core
Mali-400 MP2 *
PowerVR SGX540 *
Adreno 205 *
Adreno 203 *
GC800 *
PowerVR SGX535
PowerVR SGX531
PowerVR SGX530
Adreno 200 *
Mali-200 *
unknown *

* Approximate position of the graphics adapter

> Notebook / Laptop Reviews and News > FAQ / Tips / Technics > Comparison of Laptop Graphics Cards > AMD Radeon HD 7640G + HD 7670M Dual Graphics
Author: Klaus Hinum (Update: 2013-01-17)